functional magnetic resonance imaging (fMRI) is a technology that alllows resear

Question

functional magnetic resonance imaging (fMRI) is a technology that alllows researrcherss to seee which areass of the brainn are receeiving the most blood floww whenn a subject is performing an activity. Why would bloood floww to particular parts of the brainn change when the brainn is perforrming specificc taskss? THat is, what does thiss tellll you about the functionall divvision of the brain? What is in the blood that speccific brainn regiions neeed when they become more activve? What do active neuronss require so much energyy? (what is using up all the energy?)

Explanation / Answer

Different parts of the brain performs different functions. When a person is sleeping, only the part which controls involuntary functions in the body needs to work. When a person is studying or thinking, the part of the brain related to that particular function needs to work. Whichever part of he brain has to work more at particular time, that part requires more oxygen from the blood. Neurons require the energy supplied by oxygen in blood. This is because nerve impulses are continuously converted to electrical impulses and get transmitted and this is an energy consuming process.

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